改扩建老旧硬路肩承载能力评估及利用研究

Study on Evaluation and Utilization of Bearing Capacity of Shoulder in Reconstruction and Extension of Old and Hard Road

利用落锤式弯沉仪FWD的单点弯沉值、弯沉差、各结构层动态模量、弯沉盆参数Dx-Dx,多角度评估复合式路面硬路肩路面承载力;通过现场各结构层取芯及强度试验,分析影响硬路肩路面承载能力的主要因素。在分析硬路肩利用方式的基础上,运用有限元软件模拟计算保留硬路肩拼接旧路面结构层的力学状况,结果表明保留硬路肩是可行的。

The bearing capacity of hard shoulder pavement of composite pavement is evaluated from multiple angles by using FWD single point deflection value,deflection difference,dynamic modulus of each structural layer and deflection basin parameter Dx-Dx,and the main factors that influence the bearing capacity of hard shoulder pavement are analyzed through core-taking and strength test of every structure layer on site.Based on the analysis of hard shoulder utilization,the finite element software is used to simulate and calculate the mechanical condition of the splicing old pavement structure layer of retaining hard shoulder.The results show that it is feasible to retain hard shoulder.